Important: #97462 - Removed MSSQL supportive code

See forge#97462


Support for Microsoft SQL Server (MSSQL) has been dropped as supported database system with forge#96553.

Therefore supportive code for MSSQL has been removed from Core, additionally to Align SystemEnvironment checks to changed requirements.

  • special handling for MSSQL platform/driver has been remove on several places
  • removed internal doctrine/dbal facade classes